Quiz về Hệ thống Thông tin

Who invented the telephone?

• Thomas Edison

• Alexander Graham Bell

• Nikola Tesla

• Michael Faraday

Which telecommunications network was built to provide the service of sending and receiving typed messages worldwide since the 1930s?

• Telephone network

• Telex network

• Videotex network

• Public Switched Data Network (PSPDN)

What is the fundamental difference between Circuit Switched Data Network (CSPDN) and Packet Switched Data Network (PSPDN)?

• CSPDN operates based on direct connection, while PSPDN breaks data into packets.

• CSPDN has a higher data transmission speed than PSPDN.

• PSPDN does not support data transmission between computers.

• CSPDN only operates domestically, while PSPDN operates internationally.

According to the functional block diagram of the information system, which component does not belong to the digital information system?

• Formatting block

• Modulation block

• Demodulation block

• Mechanical transmission block

Which block in the digital information system is responsible for reducing the number of binary bits to transmit the message?

• Source coding block

• Formatting block

• Channel coding block

• Modulation block

What is a disadvantage of digital information systems?

• Cost reduction

• Suitable for data transmission

• Not affected by noise and signal distortion

• More complex and harder to maintain than analog systems

Which transmission channel is commonly used to transmit information in digital telecommunications?

• Optical fiber

• Coaxial cable

• Waveguide

• All of the above

Which organization does the International Telecommunication Advisory Committee (CCITT) belong to?

• International Telecommunication Union (ITU)

• United Nations (UN)

• European Union (EU)

• IEEE Association

One of the advantages

Which organization does the International Telecommunication Union (ITU) belong to?

• International Telecommunication Union (ITU)

• United Nations (UN)

• European Union (EU)

• IEEE Association